Coating machine



Feb. 6, 1934. CHAPIN 1,945,519

COATING MACHINE Filed April 13, 1951 2 Sheets-Sheet l H. L. CHAPINCOATING MACHINE Feb. 6, 1934.

Filed April 13, 1931 2 Sheets-Sheet 2 Patented Feb. 6, 1934 UNITEDSTATES COATING MACHINE Herbert L. Chapin, Swampscott, Mass., assignor toUnited Shoe Machinery Corporation, Paterson, N. J.,' a corporation ofNew Jersey Application April 13, 1931. Serial No. 529,714

11 Claims.

shoe to the brush in a position accurately determined by suitable gagingand feeding elements. The problem of uniformly and completely coating aheel section exactlyto a predetermined line and of protecting all otherparts of the shoe from blacking is one of difficulty. This isparticularly true under the conditions of commercial manufacture wherethe operator must present one shoe after another to the machine at arapid rate and where quantities of blacking are carried by brushes andother applying devices which are in continuous motion. It has been thepractice heretofore to protect the counter portion of the shoe above therand crease by a rotary guard which serves to determine the location ofthe shoe with reference to the applying brush, to assist in feeding thework, in applying theblacking about the entire periphery of the heel andalso to prevent blacking from reaching'the counter. The presentinvention comprises improved means for scraping or cleaning such arotary guard so that blacking which may accidentally reach its face I,is reliably removed before it can be carried against 35 the counter. Inone aspect my invention consists in improvements in machines of thetype'disclosed in my prior patent. In a broader aspect, it consists inimprovements applicable to any coating machine employing a rotary guardor disk for protecting portions of the work.

As herein shown, a scraper frame is mounted adjacent to the face of therotary guard in such a manner as to be free for bodily movementtransversely of the axis of the guard and is provided with scrapermembers engaging the guard in areas on opposite sides of its axis. Theconstruction is preferably such that the scraper frame is maintained inafioating relation to the of this construction is that the entiresurface of .guard so that the scraping members will auto the guard isreliablyand'completely cleaned in each revolution of all blacking whichmay reach it in the form of drops splashed from the brush or othermoving parts or as surplus blacking displaced from the rand blacking rimof the guard.

These and other features of the invention will be best understood andappreciated from the following description of a preferred embodimentthereof, selected for purposes of illustration and shown in theaccompanying drawings, in which Fig. 1 is aview of the machine in frontelevation; V

Fig. 2 is a plan view of the rotary guard and associated parts; v

Fig. 3 is a view in side elevation, on an enlarged scale, of the sameparts, shown partly in'section; and

Fig. 4 is an end view of the scraper shown in its relation to the guardshaft.

' The illustrated machine is of the type shown in my prior Patent No.1,760,115, to which reference may be had for details of construction notspecifically described herein. In this machine the head frame 10supports a bearing member 2 in which is journaled a horizontal shaft 3carrying at its left-hand end a fiat rotary blackingapplying brush 4.The brush is confined at opposite sides between disks 5 and 6 which arecarried bythe shaft 3 and is supplied with blacking by a rotarytransferring device '7. Liquid blacking is contained within a trough 11supported between the sides of the frame 10 and is conveyed to thetransferring device by mecha nism which forms no part of the presentinvention. The shaft 3 and brush 4 are driven at a suitable speed andthe brush is given a def-' inite width by the confining disks 5 and 6 sothat a uniform coat of-blacking of the width of the brush is applied tothe periphery of a heel presented thereto by the operator. A scraper 8is provided for cleaning the outer surface of the right-hand disk 5.

, The machine frame 10 is provided at its lefthand side with a pair ofstationary bosses 12 and 13 which project forwardly in spaced relationand are. perforated transversely to receive respectively cylindricalstems or studs 14 and 15. The stems 14 and 15 are disposed in parallelrelation and constitute part of a holder which includes ahead or yoke 16which is disposed inv substantially vertical position and bowed or concaved at its inner face to clear parts of the machine to be presentlydescribed. 1

The stems 14 and 15 are rigidly but adjustably secured within the bosses12 and 13 and tion of the shoe.

constitute supports for a bearing head 17 which is provided at each endwith upwardly and downwardly-extending perforated arms which receive thestems and are adjustably secured thereto by suitable set screws. Thelower boss 12 is provided with an adjusting screw 20 which is threadedthrough the boss and bears at its inner end against the innerdownwardly-projecting arm of the bearing head 1'7: The outerdownwardly-projecting arm is perforated so that the head of theadjusting screw may be reached for purposes of adjustment. It will beapparent that the longitudinal position of the bearing head upon thestems 14 and 15 may be accurately determined-by the setting of the screw20. t In the bearing head 17 is journaled a horizontal shaft 21 havingat its outerend a collar 18 and at its inner end a rotary guardcomprising a conical disk 22 having an outer peripheral rim 23 and aninner annular rim 24. The rotary guard is clamped against the recessed,end of the shaft 21 by a thimble 25which overlaps the inner flange 24 ofthe guard and is held in place by a taper head clamping screw 26threaded into the end of the shaft. The clamping screw 26 carries also adisk 2'7 which is contained within the hollow body of the disk 22 andservesas one element of the connection between the guard shaft and brushshaft, although the complete detail of this feature is not illustratedsince it forms no part of the present invention. The outer flange 23 ofthe guard is designed to run inthe rand crease of the 'shoe for thedouble purpose of accurately and positively locating the heel to beblacked with respect to the blacking-applying brush 4 and of applyingblacking to the ledge or shoulder of the heel between the heel and thecounter por- For the latter purpose blacking is applied to theright-hand face of the rim 23 by means not herein shown. The fact, hjowever, that this rim of the guard is intended to carry and apply blackingexplains one manher in which the outer face of the guard is likely toreceive blacking and emphasizes the necessity for effective cleaning orscraping means.

As herein shown, the head or yoke 16 above mentioned is utilized as asupporting member for the scraper, which will now be described. 'At itsupper and lower ends in positions substantially vertically in line withthe axis of the shaft 21, the head 16 is provided with forked wings 28forming spaced vertically-disposed grooves. The scraper frame29-comprises a curved bar bowed outwardly at its center so as to provideample clearance for the shaft 21, as shown in Fig. 4, and provided ateither end with a vertically-disposed tongue which is arranged to slidefreely in the forked wings of the head 16. There is thus established atongue and groove connection between the vertically stationary head 16and the scraper frame 29 which permits the latter to move longitudinallyand transaxially or transversely with reference to the axis of the shaft21. At its upper and lower ends the scraper frame 29 'is provided withinclined tapering pockets 30in each of which is removably received awiping or scraping pad 31 of felt or other suitable wiping or scrapingmaterial. The pockets30 and the pads containedtherein are inclined at anangle corresponding to the inclination of the conical surface of the.disk 22 and it will be seen that the pads 31 engage the disk in areaswhich are diametricallydis-posed on the'surface of the disk. The end ofeach stem 14 and 15 is recessed to receive a compression spring 32 andthe outer end of each of these springs is received in a correspondingsocket formed in the outer face of the scraper frame. The springs,therefore, constitute a yielding connection between the verticallystationary head 16 and the scraper frame, and by bending permit alimited vertical movement of the scraper frame and also a rockingmovement thereof. At the same time they urge the scraper frame alwaystoward the rotary guard and maintain the pads 31 in engagementtherewith.

I It will be seen that the connection above described maintains thescraper frame 29 in floating engagement-with the conical disk 22 of therotary guard, that isto say, while the scraper is maintained inengagement with the surface of the guard it is permitted to float ormove vertically and also to rock so that the pads 31 may be maintainedcontinuously and accurately in engagement with the outer face of theguard which, for the successful operation of the machine, it isimportant to maintain in a clean condition. The scraper as a 'wholetends to conform itself to the surface of the guard and to maintain aconcentric:

surface of the guard clear out to the far edge thereof, maintaining itsentire surface clean and disposing of any'blacking which might find itsway over'the rand crease flange 23. the surfaces of the disk 22 or theflange 23 contain irregularities or are 'not true surfaces of revolutionwith respect to the axis of the shaft 21, the scraper frame 29 ispermitted to rock and thus follow the rotation of the guard regardlessof any wab'blethat might occur in it.

As a result of the construction above disclosed, coating machines havingthis improved equipment are more cleanly in their operation thanheretofore, damage to the goods by staining is avoided, and in generalthe product of the machine is improved and the work of the operatorfacilitated. While the invention has been described in its applicationto a blacking machine, it will be understood that the term is usedgenerically to include liquid stain, lacquer, paint and coatings of alldescription and that in general the invention may be usefully applied inany machine employing a rotary guard or gage intended to have contact atany time with the work.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. Ina coating machine having a rotary brush anda rotary guardassociated therewith, a scraper frame mounted adjacent to the outer faceof the guard for free bodily movement transversely of the axis of theguard, said frame having scraperv members engaging the guard in areas onopposite sides of its axis, means for preventing rotative movement ofthe scraper frame with the guard, and flexible means for supporting saidframe against gravity;

2. In a coating machine having a rotary brush and a rotary guardassociated therewith, a scraper frame mounted for free adjustingmovement transversely of the axis of the guard and also Further, if

in'a direction parallel to said axis, said frame having scraper membersengaging the guard in areas on opposite sides thereof, and guides tocontrol the transverse adjusting movement.

3. In a coating machine having a rotary brush and a rotary guardassociated therewith, a scraper frame guided for movement transverselyof the axis of the guard and yieldingly supported so that it may rock ateither end toward or from the guard, and having scraper members engagingthe guard at separated areas on one surface.

4. In a coating machine having a rotary brush and a guard associatedtherewith and arranged to rotate about a substantially horizontal axis,a scraper frame having scraper members which conform to the face of theguard above and below its axis, and guiding means for said framepermitting vertical movement thereof so that it may follow the guard inany eccentric movement thereof and allowing also free rocking movementto follow any irregular movement of the guard face.

5. In a coating machine having a rotary brush, a driven shaft carrying arotary guard disposed adjacent to the brush, a curved scraper framearranged to extend about said shaft with clearance, scraper membersmounted upon the scraper frame in position to engage the disk indiametrically opposite areas. and yielding supporting means for thescraper frame constructed and arranged to allow it to float transverselyof the axis of said guard.

6. In a coating machine having a rotary brush, a carrier movable towardand from one face of the brush and having a rotary guard mountedtherein, a scraper frame yieldingly supported by said carrierconstructed and arranged for floating movement either axially ortransaxially in relation to the guard, and scraper members mounted insaid scraper frame to engage the face of the guard in diametricallylocated areas.

7. In a coating machine having a rotary brush, a convex guard arrangedto rotate adjacent to said brush, a scraper frame supporting scrapermembers positioned in tilted relation for firm engagement with theconvex face of the guard, a sliding mounting for said scraper framepermitting movement transverse to the axis of the guard, and springs forpressing said frame toward the guard, thereby tending to maintain thescraper members concentric with respect to the guard and in contacttherewith regardless of eccentricity in the guard.

8. In a coating machine having a rotary brush, a conical disk disposedadjacent to said brush, a scraper frame having pockets inclined to theaxis of the disk and tapering outwardly from said axis maintainingscraper pads in contact with spaced areas upon the conical disk, meansfor loosely supporting said frame, and individual yielding meanspressing said pads toward the disk, thereby tending to center thescraper with respect to the disk in all positions of the latter,

9. In a blacking machine having a rotary brush, a driven rand creasedisk disposed adjacent to said brush and having a convex outer surfacearranged to protect the counter portion of a shoe during the heelblacking operation, a supporting member adjacent to the disk, a scraperframe having tongue and groove connection with said member permittingtransaxial sliding movement thereof, springs operating to press saidframe toward the disk, and inclined Wiping pads on the frame bearingupon the convex surface of the disk at points on opposite sides thereofand tending to react with the disk to shift the position of the scraperframe to follow irregularities in the rotation of the disk.

10. In a blacking machine having a rotary brush, a driven shaft carryinga circular guard for the brush, a support having aligned slots disposedat opposite sides of the shaft, a scraper frame mounted in said slotsfor sliding movement transversely of the shaft and for sliding movementcoaxial with the shaft, said scraper frame being shaped to extend aboutthe shaft with clearance and having pockets located at diametricallyopposite positions with reference to the axis of the brush and in a lineparallel to the slots of the support, pads removably contained in saidpockets, and springs for yieldingly urging the scraper frame and guardtoward each other.

11. In a coating machine having a rotary brush, a convex guard arrangedto rotate adjacent to said brush, a scraper frame supporting scrapermembers in engagement with the convex face of the guard and mounted forbodily movement transversely of the axis of the guard,

a supporting member adjacent to said disk provided with recesses onopposite sides of the axis of said guard, and helical springs the majorportions of which are received in said recesses and the projectingportions of which are secured to said scraper frame, thereby permittinglimited movement of the scraper frame transversely of the axis of theguard and operating to urge the scraper members into firm engagementwith theguard.

HERBERT L. CHAPIN.

